Weft-thread exchange device for looms



Nov. 25, 1924.

G. SIEBER WEFT THREAD EXCHANGE DEVICE FOR LOOMS Filed April 9, 1923 M littorme? I 1 J): van for;

Patented Nov. 25, 1924.

UNITED STATES 1,516,869 PATENT OFFICE.

GOTTWALT SIEBER, 015 PLAUEN, GERMANY, ASSIGNOR T VOGTLANDISCHE MASCHIN- ENFABRIK (VORMALS J. C 66 H DIETR-ICH) AKTIENGESELLSCHAFT, OF IE'LAUEN,

GERMANY.

WEFT-THREAID EXCHANGE DEVICE FOR LOOMS.

Application filed April 9,

To all 20/10/71 it may concern Be it known that 1 Go'iawvAur SlI'IBMR, a citizen of the German Republic, and a resident of Plauen, Saxony, Germany, have invented a new and useful Improved lVeft- Thread Exchange Device for Looms, of which the following is a specification.

There are known looms with automatic shuttle exchange rendering it possible to introduce weft threads of various colors into the shed formed by the warp threads. With the known arrangements the shuttle boxes are, however, connected with the batten, and the shuttles are arranged therein either side by side or one below the other or they are distributed around the circumference of a drum so that always only a restricted number of shuttles, or differently colored threads respectively, can be provided.

To obviate this drawback the weft thread boxes shall be arranged, according to the present invention, in a plurality of rows, viz, side by side, as well as one above the other and they are, consequently, adjustable in two directions. Under the term weft thread boxes or carriers and shuttle boxes or carriers 1: comprehend throwing shuttles, as well as the holding devices for the free weft thread ends of catcher looms, and under the frame holding said boxes or carriers together I comprehend on one side the shuttle boxes or carriers and on the other side the weft thread guide plate.

My invention is illustrated, by way of example, in the accompanying drawing, in which Figure 1 is a front view of a loom with one-sided shuttle exchange; Figure 2 is a similar illustration showing a loom with double-sided shuttle exchange; Figure 3 is a front view of a loom working with a plug shuttle, and Figures el and 5 show two differently devised means for adjusting the shuttle boxes (Figure or the weft thread guide plate (Figure 5) respectively.

Referring to Figure 1, 1 is the frame of the loom, 2 is the batten, and 3 the reed which two latter parts are reciproc'ated in known manner. At one side of the batten 2 is arranged ashuttle driving device of known kind. This device consists of the beating arm i, the belt 5, and a driving member guided in the box 6, which moves in known manner together with the batten 2.

On the other side of the loom is arranged a shuttle exchange device consisting of a the shuttle.

1923. Serial No. 630,963.

shuttle box 7 divided into compartments extending in two directions. The diagrammatical illustration Figure 4 shows that the compartments may be arranged in concentric circular curves, and form at the same time groups extending along the radii of these curves. 10 is the centre of the respective circles. 7 is the shuttle box containing the compartments in question. It is supported by a vertical arm 7 attached at the point 10 to a horizontal arm 11 secured at its other end to a rocking shaft 12 supported in the loom frame. Another horizontal member, viz, a rod 14, is connected at 13 with the shuttle carrier arm 7 and at 15 with another vertical arm or lever 16 secured at 17 also to a shaft supported in the frame.

Another arrangement in which the compartments form horizontal rows, as well as vertical ones, is illustrated diagrammatically in Figure 5 in whichthe shuttle box 7 is encompassed by a vertical frame 18 which may be moved vertically, as well as horizontally. The vertical motion is effected by a horizontally slotted member 20,*the slot of which is engaged by the lower end of the shuttle box arm 19, and by bell-crank levers 21 and 22 connected with each other by a bar 23, and, furthermore, by a bar 24 which connects the bell-crank lever 21 with a lever 25 affixed to the rocking shaft 12. The horizontal motion is effected by bell-crank levers 26 and 27, a rod 28 connecting these levers with each other, and a rod 29 which connects the bell-crank lever 27 with an arm 30 secured to the rocking shaft 17.

It is obvious that the shuttle carrier may be adjusted by the shafts 12 and 1.7 in such a manner that any desired compartment registers with the path of the batten. On the other side of the shuttle carrier, a driving member 31 (Figure 1) or 31. (Figure 2) is provided which is rcciprocatcd in known manner, for instance by means of a beating arm and a belt. The driving member is so shaped that it drives the shuttle out of the carrier or box 7 without doing any damage to this latter. On account of this the driver is provided with a beating bolt 32 of such a length that it can enter sufficiently deeply into the respective compartment of the box 7 and act suitably on The shifting of the shuttle box or carrier is effected automatically by the automaton 34, Figs. 1-3, which may be of any desired construction and is controlled in known manner by means of a Jacquard card 33.

The loom shown in Figure 1 is distinguished by the particularity that the shuttle exchange device is arranged on only one side, in consequence whereof every shuttle which has been driven through the shed by the driving member 31/32 must be thrown back into its former position by the shuttle operating device 4/5, as it is necessary that every shuttle get back into the compartment to which it pertains before the exchange is made. A consequence of this manner of operation is that two weft threads of the same color lie side by side. If this is undesired because of the fineness of the piece of work, two shuttle throwing devices are employed, one on one side, the other on the other side of the loom, as illustrated in Figure 3, in which 7 and '2' are the two devices in question. They are actuated by the rocking shafts 12 and 17 already described in connection with Figures t and 5, and both are equally operated. The number of the compartments of each shuttle box (7 and 7) corresponds to the number of the shuttles, there being thus, in the whole, two compartments for each shuttle, each shuttle traversing from its appertaining compartment on one side to its appertaining compartment on the other side. There is at any rate an empty compartment for the arriving shuttle and it is practically impossible that errors would arise. Of course, there is also driving member on either side. 31 is the driving member on the left (Figure 2), 31" that on the right. I prefer to actuate always both members, although only one is used at time, but there is then absolute certainty that the shuttle is thrown through the shed. This renders it possible that, independent of the position or place of the shuttle at the time being, the shuttle is always moved in the right manner without necessitating the provision of special lifters or lifting wires in the automaton in order to determine the direction of motion of the shuttle and of the associate driving member.

Figure 3 illustrates a loom operating not with a plurality of throwing shuttles. but with a weft-thread gripper which guided on a path 36 and is reciprocated in rnown manner by a lever or an arm 38 and a connecting link 37. oppositely to the push shuttle 35, on the other sid of the loom, is arranged a guide plate at which terminate the free ends of a comparatively large number of weft threads in thread guides. According as this guide plate is adjusted, now one and then another weft thread is moved into the path of the push shuttle and is then seized thereby and pulled through the warp thread shed. The manner of, and the means for, fastening the thread ends in the plate 70 are known. But a new feature is the distribution of the compartments in or on the plate in such a manner that the plate can be shifted in two directions, similarly to the shuttle carriers or boxes of Figures a and 5, in order to adjust the various threads ready for seizing by the weft thread gripper The means for effecting the two motions of the plate 70 may be such as shown in Figure l or in Figure 5 or equivalent ones, the two rocking shafts (such as 12 and 17, Figures 4: and 5) being actuated by the automaton.

I claim:

1. In a loom, the combination with a weft thread carrier having the threads arranged side by side, as well as one over the other, and with a frame holding said carrier, of means for moving the said carrier in one of the two directions, and means for moving said frame in the other of said two direc tions.

2. In a loom, the combination with a weft thread carrier having the threads arranged side by side, as well as one over the other, and with a frame holding said carrier, of two rocking shafts, and means connecting said shafts with the said carrier, said means forming two sets, of which one is adapted to make the carrier move in the direction of the threads lyin side by side, and the other is adapted to make the carrier move in the direction of the threads lying one over the other.

3. In loom, the combination, with a weft thread carrier having the threads arranged in concentric circular rows, as. well as in radial rows, the centre of which coincides with the centre of said circular rows; of means for moving said carrier in the direction of the said circular rows, and means for moving it in the direction of the radial rows l. In a loom. the combination, with a weft thread carrier having the threads arranged in concentric circular rows, as well as in radial rows. the centre of which coincides with the centre of said circular rows; of two rocking shafts. and two systems of inc-- tion-transmitting means connecting said shafts with the said carrier. one system b ing adapted to trai'isniit the motion so as to make the carrier move in one row direction, the other system being adapted to transmit the motion so as to make the carrier move in the other row direction.

In testimony whereof I aflix my signature in presence of a witness.

fl OTTVALT SIEB ER.

Witness E. Honnrnannxn. 

